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<head>
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    <title>163图片新闻切换效果</title>
    <style type="text/css">
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        .focusPic .pic{margin:0 auto; width:240px; height:180px; padding:2px 0 0;}
        .focusPic .adPic{margin:0 auto 5px; width:240px; height:29px; overflow:hidden;background:url(http://tech.163.com/newimg/adpic.gif);}
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        .focusPic p img {margin:0px 0 2px;}
        .focusPic .more{ margin:0 auto; width:240px; }
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        .focusPic .more .textNum .text{float:left; font-weight:bold; padding:7px 6px 0 0; color:#666;}
        .focusPic .more .textNum .num{float:left; width:113px; height:19px;}
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        .focusPic .more .textNum .num li a{color:#fff; padding:0 5px; }
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    <script language="JavaScript" type="text/javascript">
        var nn;
        nn=1;
        setTimeout('change_img()',6000);
        function change_img()
        {
            if(nn>4) nn=1
            setTimeout('setFocus1('+nn+')',6000);
            nn++;
            tt=setTimeout('change_img()',6000);
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        function setFocus1(i)
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            selectLayer1(i);
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        function selectLayer1(i)
        {
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                case 1:
                    document.getElementById("focusPic1").style.display="block";
                    document.getElementById("focusPic2").style.display="none";
                    document.getElementById("focusPic3").style.display="none";
                    document.getElementById("focusPic4").style.display="none";
                    document.getElementById("focusPic1nav").style.display="block";
                    document.getElementById("focusPic2nav").style.display="none";
                    document.getElementById("focusPic3nav").style.display="none";
                    document.getElementById("focusPic4nav").style.display="none";
                    break;
                case 2:
                    document.getElementById("focusPic1").style.display="none";
                    document.getElementById("focusPic2").style.display="block";
                    document.getElementById("focusPic3").style.display="none";
                    document.getElementById("focusPic4").style.display="none";
                    document.getElementById("focusPic1nav").style.display="none";
                    document.getElementById("focusPic2nav").style.display="block";
                    document.getElementById("focusPic3nav").style.display="none";
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                    break;
                case 3:
                    document.getElementById("focusPic1").style.display="none";
                    document.getElementById("focusPic2").style.display="none";
                    document.getElementById("focusPic3").style.display="block";
                    document.getElementById("focusPic4").style.display="none";
                    document.getElementById("focusPic1nav").style.display="none";
                    document.getElementById("focusPic2nav").style.display="none";
                    document.getElementById("focusPic3nav").style.display="block";
                    document.getElementById("focusPic4nav").style.display="none";
                    break;
                case 4:
                    document.getElementById("focusPic1").style.display="none";
                    document.getElementById("focusPic2").style.display="none";
                    document.getElementById("focusPic3").style.display="none";
                    document.getElementById("focusPic4").style.display="block";
                    document.getElementById("focusPic1nav").style.display="none";
                    document.getElementById("focusPic2nav").style.display="none";
                    document.getElementById("focusPic3nav").style.display="none";
                    document.getElementById("focusPic4nav").style.display="block";
                    break;
            }
        }
    </script>
</head>
<body>
<div class="focusPic">
    <div id="focusPic1" style="display:block ;">
        <div class="pic"> <a href="http://tech.163.com/special/000915SN/soft2005.html"><img src="http://cimg.163.com/tech/2006/1/18/2006011810122068706.jpg" alt="网易学院05年软件评选结果" width="240" height="180" border="0" /></a> </div>
        <h2><a href="http://tech.163.com/special/000915SN/soft2005.html">网易学院05年软件评选结果</a></h2>
        <p>经过大家的热情投票和我们的辛劳整理，网易学院2005年年度软件评选结果终于出炉啦。点击进入查看……<img src="/newimg/i2.gif" alt="详细" width="3" height="5" /> <a href="http://tech.163.com/special/000915SN/soft2005.html" class="cDRed">详细</a></p>
    </div>
    <div id="focusPic2" style="display: none ;">
        <div class="pic"> <a href="http://tech.163.com/discover/"><img src="http://cimg.163.com/tech/2006/1/17/200601171557008cee7.jpg" alt="颠覆丛林动物生存法则" width="240" height="180" border="0" /></a> </div>
        <h2><a href="http://tech.163.com/discover/">颠覆丛林动物生存法则</a></h2>
        <p>群居动物的这种行为颠覆了我们通常认为的，在动物世界通行的 “丛林法则”，动物不都自私，不都是弱肉强食的。<img src="/newimg/i2.gif" alt="详细" width="3" height="5" /> <a href="http://tech.163.com/discover/" class="cDRed">详细</a></p>
    </div>
    <div id="focusPic3" style="display: none ;">
        <div class="pic"> <a href="http://tech.163.com/special/00091MNJ/itobserve015.html"><img src="http://cimg.163.com/tech/2006/1/17/2006011711483290a60.jpg" alt="WAPI并非贸易阴谋" width="240" height="180" border="0" /></a> </div>
        <h2><a href="http://tech.163.com/special/00091MNJ/itobserve015.html">WAPI并非贸易阴谋</a></h2>
        <p>近日国家做出决定：“将向其他的国内及国外企业公布该算法”。事实证明中国WAPI标准并非是贸易阴谋。<img src="/newimg/i2.gif" alt="详细" width="3" height="5" /> <a href="http://tech.163.com/special/00091MNJ/itobserve015.html" class="cDRed">详细</a></p>
    </div>
    <div id="focusPic4" style="display: none ;">
        <div class="pic"> <a href="http://tech.163.com/special/00091OSI/horizons.html"><img src="http://cimg.163.com/tech/2006/1/17/200601171002503f251.jpg" alt="新视野号探测冥王星特别专题" width="240" height="180" border="0" /></a> </div>
        <h2><a href="http://tech.163.com/special/00091OSI/horizons.html">新视野号探测冥王星特别专题</a></h2>
        <p>美国宇航局将于北京时间18日凌晨2时24分发射新视野号探测器，造访这颗人类唯一尚未探测过的行星-冥王星。<img src="/newimg/i2.gif" alt="详细" width="3" height="5" /> <a href="http://tech.163.com/special/00091OSI/horizons.html" class="cDRed">详细</a></p>
    </div>
    <div class="more">
        <div class="textNum">
            <div class="text">&gt; 更多头图新闻</div>
            <div class="num bg1" id="focusPic1nav" style="display: block;">
                <ul>
                    <li>1</li>
                    <li><a href="javascript:setFocus1(2);" target="_self">2</a></li>
                    <li><a href="javascript:setFocus1(3);" target="_self">3</a></li>
                    <li><a href="javascript:setFocus1(4);" target="_self">4</a></li>
                </ul>
            </div>
            <div class="num bg2" id="focusPic2nav" style="display: none;">
                <ul>
                    <li><a href="javascript:setFocus1(1);" target="_self">1</a></li>
                    <li>2</li>
                    <li><a href="javascript:setFocus1(3);" target="_self">3</a></li>
                    <li><a href="javascript:setFocus1(4);" target="_self">4</a></li>
                </ul>
            </div>
            <div class="num bg3" id="focusPic3nav" style="display: none;">
                <ul>
                    <li><a href="javascript:setFocus1(1);" target="_self">1</a></li>
                    <li><a href="javascript:setFocus1(2);" target="_self">2</a></li>
                    <li>3</li>
                    <li><a href="javascript:setFocus1(4);" target="_self">4</a></li>
                </ul>
            </div>
            <div class="num bg4" id="focusPic4nav" style="display: none;">
                <ul>
                    <li><a href="javascript:setFocus1(1);" target="_self">1</a></li>
                    <li><a href="javascript:setFocus1(2);" target="_self">2</a></li>
                    <li><a href="javascript:setFocus1(3);" target="_self">3</a></li>
                    <li>4</li>
                </ul>
            </div>
        </div>
    </div>
</div>
</body>
</html>